Elevator lock



W. S. CAMPBELL.

ELEVATOR LOCK.

APPLICATION man Nov.2s, 1919.

1,417,449. Patented May 23, 1922;

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gmM- Q Ana/Mrs W. S. CAMPBELL. ELEVATOR LOCK.

APPLICATION FILED NOV.25,I9l9- v I 1,417,449. Patented May 23, 1922.

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WITNESSES W. S. CAMPBELL. ELEVATOR LOCK.

1,417,449. APPLICATION FILED. NOV. 25. 1919'- Patented May 239 '4 SHEETSSHEET 4. B a 2 WITNESSES INVENTOH EVZZZZamS amj beZ MM l1 TTOR/IIEYS WILLIAM S. CAMPBELL, OE NEW KENSINGTON, PENNSYLVANIA.

ELEVATOR LOCK.

Application filed November 25, 1919.

To all to hom it may concern:

Be it known that I, illman Scorr CAMP- BELL, a citizen of the United States, and a resident of New Kensington, in the county of lVestmoreland and State of Pennsyl Vania, have invented certain new and useful Improvements in Elevator Locks, of which the following is a specification.

My invention relates to improvements in elevator locks, it being for use on both passenger and freight elevators, and it consists in the constructions, combinations and arrangements herein described and claimed.

One of the foremost objects of the inven tion is to provide an elevator door lock, which is so arranged that the power cannot be turned on until the door is closed and locked.

A further object of the invention is to provide means making the invention adaptable to passenger elevators wherein there are usually two doors required to be opened and closed by the operator, the adapting means causing both doors to be operated simultaneously, but so far as the door lock is concerned, that is substantially the same as described in the preceding paragraph.

A further object of the invention is to provide a lock for the door or doors leading from a landing to the elevator shaft, operated by the power controller of the elevator.

A further object of the invention is to provide means for preventing the gates of an elevator shaft from. being opened except when the elevator is ready to receive freight,

and to prevent the elevator from being moved until the gates are closed and securely fastened.

A further object of the invention is to provide a device of the character above described, compelling the closing and locking of freight elevator shaft doors before the elevator can be moved and to prevent the opening of the doors until the elevator is in position to receive freight.

Another object of the invention is to provide an elevator lock arranged to prevent the opening of an elevator shaft door from the outside, the lock of said door being controlled by the operator from the inside of the elevator.

Other objectsand advantages will appear Specification of Letters Patent.

Patented May 23, 1922.

Serial No. 340,447.

in the following specification, reference being had to the accompanying drawings, in which: 1

Figure l is a side elevation of a passenger elevator, in the use of which double doors are employed, showing the improved eleator lock and. means for operating the same applied. M

Figure 2 is a detail side elevation of the structure in Figure 1, showing the controller handle moved to one side to hoist the eleator, the lock of the shaft opening door then assuming the operative position.

Figure 3 is a front elevation of the elevator-carrying mechanism, viewed substantially on the plane 3-8 in Figure 2,

Figure 4 is is a detail horizontal section taken substantially on the line t-4 of Figure 1,

Figure 5 is a detail perspective view showing how the handle grip, which is a part of the mechanism, is applied tothe controller handle of the elevator,

Figure 6 is a detail perspective view. showing the door lock which is mounted in the elevator shaft, from the rear,

Figure 7 is a detail view of the shaft door latch, which is arranged to be simultaneously operated upon the opening, of the pasenger elevator door, and

Figure 8 is a cross section taken substantially on the line 8-8 of Figure 3.

This application discloses one of two main forms of my invention, namely, the passenger elevator structure. The structure for freight elevators is disclosed in my co-pending divisional application, Serial No. 432,531, filed Dec. 22, 1920. In both forms, the principle of operation is the same, and in order that a clear understanding of the present invention may be had, attention is directed to The passenger elevator structure.

Referring to Figures 1 and a, it is to be observed that the passenger elevator 1 carries an inside door 2, which is commonly constructed as a collapsible frame consisting of various arrangements of bars pivoted together. It is unnecessary to describe this door in detail because it is of a well known construction.

The passenger elevator 1 runs in the shaft 3, which has a plurality of landing openings 4 arranged to be closed by outside doors These operate in any suitable manner on tracks or guides 6.

In order that both doors, namely 2 and 5, may be operated simultaneously, that is to say, that both may be opened or closed by one act on the part of the operator, the inside door 2 carries a substantially U-shaped receiver 7. This receiver in riding up or down with the elevator, movesupon the lug 8, projecting inwardly from the bolt 9, and causes the actuation of the bolt in accordance with the movement of the door 2.

' Consider Figures 4 and 7. The lug 8 projects out of the slot 10 of the casing 11 which houses the bolt 9 and the latch 12. The bolt 9 moves in suitable keepers 13, and has a head 14 engaging the latch projection 15 on one side, and a spring 16 engages the projection on the other side.

The latch 12 is pivoted at 17 and has a head 18 arranged to enter the recess of the keeper 19 in the door jamb. So far the operation should be clear. As the elevator approaches the landing from above or below, the receiver 7 rides over the lug 8, and when the inside door 2 is opened, the bolt 9 is first drawn over toward the right, causing the lifting of the latch 12 by reason of the engagement 14, 15, and on the continued opening movement of the door 2, the outside door 5 is drawn along with it so as to open the landing 4.

Pivotally mounted in suitable bearing means 20 on a plate 21 which is secured in the elevator shaft at a suitable point beneath the opening 4 of the landing, is the gravity operated door lock 22, which has a head 23 normally projected in the path of the door 5 as shown in Figure 4, to prevent the opening of the door from the outside. As shown in Figure 6, the lock 22 carries a weight 24 which is attached above the pivotal center, for the purpose of drawing the lock head 23 inwardly into the path of the door 5, as just explained.

The actuating mechanism for the shaft carried door lock is mounted in any convenient place or position on the passenger elevator 1, but necessarily is required to be operatively associated with the electric or other controller 25. Consider Figure 5. The handle 26 of the controller 25, occupies the notched end 27 of the handle grip 28, which is mounted 011 the extension shaft 29.

This shaft has partial bearing in the plate 30, which is afiixed at 31 to the side of the passenger elevator 1, and includes the noncircular portion 32 occupying the slot 33 of the handle grip 28, this means of connection insuring the turning of the extension shaft 29 with the controller handle 26, and at the same time permitting a certain amount of adjustment of the grip 28 with respect to side of the elevator 1. The divided ends 37 of the chain 38 are secured at 39 to the respective sides of the pulley 36, as clearly shown in Figure 1, so that when the con troller handle 26 is turned in either direction to go up or down, the chain 38 is in each case pulled upwardly in the direction of the arrow (4 in Figure 1.

In Figure 2, the controller handle 26 is shown to have been moved into the position b whereupon the chain 38 was pulled upwardly at the right, causing the counter clockwise rotation of the end pulley 40, the retraction of the ramp 41 and the raising of the weight 42. The end pulley 4O ismounted on one extremity of the counter shaft 43, and has the lower end of the chain 38 attached thereto at 44.

Mounted on the counter shaft 43, about as shown in Figure 8, is the pulley 45 which is adjustable along the shaft at 46. Arranged in parallelism both with the counter shaft 43 and ramp pulley 45, is a shaft 47 with a weight pulley 48. A chain 49, affixed at 50 to the pulley 45, hangs over the pulley 48 and carries the weight 42 at the bottom.

Secured at 51 to the chain 49 is the ramp bar 52 which is constructed and operated in both forms of the invention on substantially the same principle. lVhen employed as in Figures 1 and 2, it has the head 41, forengaging the lock bar 2 as appears more fully below.

The fastening means 51 between the chain 49 and ramp bar 52, is nothing more than a bolt or equivalent means extending between the two. The chain 49 includes an especially made link 55 for the purpose of receiving the bolt 51. The ramp bar 52 is slidably mounted in suitable angle guides 56, mounted in a suitable housing 57 which is laterally adjustably mounted at 58 in the sup porting frame or base 59.

Referring again to Figure 2, it can be understood that on turning the controller handle 26 in the direction of the arrows, the end pulley 40 and counter shaft 43 are r0 tated in the counter clockwise direction,

pulling the chain 49 over, sliding the ramp bar 52 in the same direction and removing the ramp 41 from contact with the door lock pulley4l5 has been spoken of. For this purpose, the base 59 has slots 60 which enable the movement of the housing 57 to any desired position, because in actual practice such adjustments will have to be made to compensate for variations in the positions of the elevator shaft carried parts of the lock. If the housing 57 is moved, it of course follows that the pulley 45 must be adjusted so as to keep the intervening chain 49 in the proper position straight across. As shown for example in Figures 1 and 2, the frame or base 59 is supported at 61 beneath the floor of the elevator, and has bearings 62, 63 for the shafts 43, 47.

T he 0 partition.

The door lock 22 (Figs. 2, 4 and 6) is so held by the weight 24 that the head 23 always occupies a position in the path of the door 5 (Fig. l) and prevents the opening of that door from the outside. The ramp bar 52 and head ll are normally retracted (Fig. 2), that is to say when the controller handle 26 is shifted to the right or left and while the elevator car 1 is in motion.

As soon as the elevator is stopped opposite the shaft opening 4 ig. 1) the head 23 of the lock bar 22 is moved out of the path of the door 5 so that the latter may be opened and the passengers discharged. This disengagement of the lock head is effected by the extension of the ramp bar 52 and the engagement of the head 41 with the lower end of the lock bar. Moving the controller handle 26 to the neutral position enables the weight 42 to pull down on the chain 49, so that the ramp bar 52 is pulled toward the right by virtue of the connection of the chain at 55 in Fig. 8.

Thus the door 5 remains unlocked as long as the elevator remains at the shaft opening 4. As soon as the operator shifts the controller handle 26 to the right or left (Fig. 2) the resultant pull on the chain 38 turns the shaft 43 toward the left and pulls the chain 49 8) ramp bar 52 and head 41 toward the left also. The lock bar being released enables the weight 2a to again move the head 23 into the path of the door 5 so that the latter is locked.

VVhile the construction and arrangement of the improved elevator lock as herein described and claimed, is that of a generally preferred form, obviously modifications and changes may he made without departing from the spirit of the invention or the scope of the claims.

I claim 1. In combination, elevator shaft door pivoted locking means connected thereto causing it to gravitate to the operative position when the door is closed, retracted elevator-carried means engageable therewith at the lightest side to release the door upon the approach of the elevator. and means operatively associated with the elevator controller for projecting said engaging means on movement of the controller handle to neutral and thereby release said locking means.

2. In combination, means partially per forming the functions of a lock operatively associated with an elevator shaft door, means performing the other necessary functions of the lock, carried by an elevator and extended into a normally projected position, a controller handle, actuating means operatively associated with the controller handle, for retracting the projected means when the handle is moved in either direction, and means operatively associated with said projected means for normally keeping it in the projectec position.

3. In combination with a controller handle, an extension shaft with gripping means causing the shaft to move with the handle, a reciprocable ramp normally projected when the handle is in neutral position, rotatable means associated with the ramp, and a connection between said shaft and rotatable means, so arranged that the ramp is retracted when the handle is moved in either dimotion.

4. The combination of a controller handle, an extension shaft and pulley with gripping means in engagement with the handle, a ramp, with associated means on which it is slidably mounted; revoluble means including a weighted chain to which the ramp is attached, and a flexible connection between the revoluble means and said pulley, including a divided portion causing revolution and movement of the ramp in one direction when the controller handle is shifted in either direction.

5. The combination ofacontroller handle, an extension shaft and pulley with gripping means in engagement with the handle, a ramp, with associated means on which it is slidably mounted; revoluble means includ ing a weighted chain to which the ramp is attached, a flexible connection between the revoluble means and said pulley, including a divided portion causing revolution and movement of the ramp in one direction -when the controller handle is shifted in either direction, and means operatively embodied to enable required lateral adjustments of the ramp and portions of the revoluble means.

6. In combination, the controller handle of an elevator, an extension shaft with a suitable bearing in the side of the elevator, and a handle grip adjustably secured to the shaft, with a portion engaging the handle so that the shaft rotates as the handle is shifted,

7. Elevator-carried door lock actuating means, comprising a suspended base, a pair of shafts journaled thereon, alined pulleys, laterally adjustable, with a chain affixed to 5 one, hung over the other and a Weight on the end; a housing laterally adjustable on the base, with suitable guides; a ramp bar slidable in the'guides' with a connection to the chain, and an actuating pulley on one of the shafts for the attachment of means extend- 10 ing from a oint of operation. VILLIAM S. CAMPBELL. itness:

REYNOLDS LAUGHLIN. 

